// JavaScript Document
function form1Val(){
	if(document.form1.d.value==""){
		alert("Enter value of 'D' for ROUND PERFORATIONS STAGGERED");
		document.form1.d.focus();
		return false;
	}else if(document.form1.c.value==""){
		alert("Enter value of 'C' for ROUND PERFORATIONS STAGGERED");
		document.form1.c.focus();
		return false;
	}else{
	var ad=document.form1.d.value;
	var ac=document.form1.c.value;
	var aa=document.form1.angle.value;
	if(aa==1){
		var hole=745.16;
	}else{
		var hole=645.16;
	}
	var res1=(ad*ad*90.69)/(ac*ac);
	var res2=Math.round(hole/(ac*ac));
	if(!res1){
		res1a="Invalid Value Entered";
		res2a="";
	}else{
		res1a="Open Area = "+res1+" %";
		res2a="Hole per square inch: "+res2;
	}
	document.form1.r1.value=res1a;
	document.form1.r2.value=res2a;
	}
}
function form4Val(){
	if(document.form4.w.value==""){
		alert("Enter value of 'W' for ROUND END SLOT SIDE STAGGER (SS)");
		document.form4.w.focus();
		return false;
	}else if(document.form4.l.value==""){
		alert("Enter value of 'L' for ROUND END SLOT SIDE STAGGER (SS)");
		document.form4.l.focus();
		return false;
	}else if(document.form4.cl.value==""){
		alert("Enter value of 'CL' for ROUND END SLOT SIDE STAGGER (SS)");
		document.form4.cl.focus();
		return false;
	}else if(document.form4.cw.value==""){
		alert("Enter value of 'CW' for ROUND END SLOT SIDE STAGGER (SS)");
		document.form4.cw.focus();
		return false;
	}else{
	var aw=document.form4.w.value;
	var al=document.form4.l.value;
	var acl=document.form4.cl.value;
	var acw=document.form4.cw.value;
	var aslot=aw*al;
	var bslot = 0.215*aw*aw;
	var res1=(aslot-bslot)/(acl*acw);
	var res2='';
	if(!res1){
		res1a="Invalid Value Entered";
		res2a="";
	}else{
		res1a="Open Area = "+res1+" %";
		res2a="Hole per square inch: Percent open area/Area of hole";
	}
	document.form4.r1.value=res1a;
	document.form4.r2.value=res2a;
	}
}
function form5Val(){
	if(document.form5.w.value==""){
		alert("Enter value of 'W' for ROUND END SLOT END STAGGER 1");
		document.form5.w.focus();
		return false;
	}else if(document.form5.l.value==""){
		alert("Enter value of 'L' for ROUND END SLOT END STAGGER 1");
		document.form5.l.focus();
		return false;
	}else if(document.form5.cl.value==""){
		alert("Enter value of 'CL' for ROUND END SLOT END STAGGER 1");
		document.form5.cl.focus();
		return false;
	}else if(document.form5.cw.value==""){
		alert("Enter value of 'CW' for ROUND END SLOT END STAGGER 1");
		document.form5.cw.focus();
		return false;
	}else{
	var aw=document.form5.w.value;
	var al=document.form5.l.value;
	var acl=document.form5.cl.value;
	var acw=document.form5.cw.value;
	var aslot=aw*al;
	var bslot = 0.215*aw*aw;
	var res1=(aslot-bslot)/(acl*acw);
	var res2='';
	if(!res1){
		res1a="Invalid Value Entered";
		res2a="";
	}else{
		res1a="Open Area = "+res1+" %";
		res2a="Hole per square inch: Percent open area/Area of hole";
	}
	document.form5.r1.value=res1a;
	document.form5.r2.value=res2a;
	}
}
function form6Val(){
	if(document.form6.w.value==""){
		alert("Enter value of 'W' for ROUND END SLOT END STAGGER 2");
		document.form6.w.focus();
		return false;
	}else if(document.form6.l.value==""){
		alert("Enter value of 'L' for ROUND END SLOT END STAGGER 2");
		document.form6.l.focus();
		return false;
	}else if(document.form6.cl.value==""){
		alert("Enter value of 'CL' for ROUND END SLOT END STAGGER 2");
		document.form6.cl.focus();
		return false;
	}else if(document.form6.cw.value==""){
		alert("Enter value of 'CW' for ROUND END SLOT END STAGGER 2");
		document.form6.cw.focus();
		return false;
	}else{
	var aw=document.form6.w.value;
	var al=document.form6.l.value;
	var acl=document.form6.cl.value;
	var acw=document.form6.cw.value;
	var aslot=aw*al;
	var bslot = 0.215*aw*aw;
	var res1=(aslot-bslot)/(acl*acw);
	var res2='';
	if(!res1){
		res1a="Invalid Value Entered";
		res2a="";
	}else{
		res1a="Open Area = "+res1+" %";
		res2a="Hole per square inch: Percent open area/Area of hole";
	}
	document.form6.r1.value=res1a;
	document.form6.r2.value=res2a;
	}
}
function form7Val(){
	if(document.form7.s.value==""){
		alert("Enter value of 'S' for SQUARE PERFORATIONS STRAIGHT LINE");
		document.form7.s.focus();
		return false;
	}else if(document.form7.c.value==""){
		alert("Enter value of 'C' for SQUARE PERFORATIONS STRAIGHT LINE");
		document.form7.c.focus();
		return false;
	}else{
	var as=document.form7.s.value;
	var ac=document.form7.c.value;
	var res1=(as*as*100)/(ac*ac);
	var res2='';
	if(!res1){
		res1a="Invalid Value Entered";
		res2a="";
	}else{
		res1a="Open Area = "+res1+" %";
		res2a="Hole per square inch: Percent open area/Area of hole";
	}
	document.form7.r1.value=res1a;
	document.form7.r2.value=res2a;
	}
}
function form8Val(){
	if(document.form8.s.value==""){
		alert("Enter value of 'S' for SQUARE PERFORATIONS STAGGERED");
		document.form8.s.focus();
		return false;
	}else if(document.form8.c.value==""){
		alert("Enter value of 'C' for SQUARE PERFORATIONS STAGGERED");
		document.form8.c.focus();
		return false;
	}else{
	var as=document.form8.s.value;
	var ac=document.form8.c.value;
	var res1=(as*as*100)/(ac*ac);
	var res2='';
	if(!res1){
		res1a="Invalid Value Entered";
		res2a="";
	}else{
		res1a="Open Area = "+res1+" %";
		res2a="Hole per square inch: Percent open area/Area of hole";
	}
	document.form8.r1.value=res1a;
	document.form8.r2.value=res2a;
	}
}
function construction(){
	alert("This section is under consideration temporarily.");
	return false;
}