form.html[br]
CODE
<html><head><script language=javascript src="form.js"></script>[/br]</head>[br]<body onload=show(0)>[/br]</body></html>
form.js[br]
CODE
[/br]mainboardcontent=new Array("8","abit","asus", "epox", "giga","intel","iwill","msi","others", 5,"intel", "via", "nvidia", "sis","others",4,"socket478","socket462(A)","socket370","other",3,"ddr","sdr","other",4,"soundblast","videocard","netcard","other");[br]harddcontent=new Array("6","maxtor","samsung", "hitach", "westerndata","seagate","others", 6,"40GB", "60GB", "80GB", "120GB", "160GB", "others",3,"5400rpm","7200rpm","other");[/br]cpucontent=new Array("4","Socket478","Socket462", "Socket370", "others", 6,"1M", "512KB", "256KB", "128KB", "64KB", "others",2,"111","222");[br]ramcontent=new Array("4","ddr","sdram", "rambus", "others", 4,"128M", "256KB", "512KB","others");[br][/br]selectdata=new Array("0","manual","1","1", "1","CPU","2","0", "2","MAINBOARD","5","0", "3","RAM","2","0", "4","HARDDRIVE","3","0");[br][/br][/br]function showdata(data,j)[br]{[/br] if(j==0)[br] {[/br] max=data[j*data[0]];[br] for(k=1;k<=max;k++)[/br] { [br] document.write("<option value=\""+data[k]+"\">"+data[k]+"</option>");[/br] }[br] }[/br] else[br] {[/br] old=++max;[br] max+=data[max];[/br] for(k=old+1;k<=max;k++)[br] { [br] document.write("<option value=\""+data[k]+"\">"+data[k]+"</option>");[/br] }[br] }[/br]}[/br]function add(i)[br]{[/br] for(var j=0;j<selectdata[i*4+2];j++)[br] {[br][/br] if(selectdata[i*4+3]=="0")[/br] {[br] document.write("<br><select name=\"select"+(j+1)+"\">");[br][/br] switch(i)[/br] {[br] case "1": showdata(cpucontent,j);break;[/br] case "2": showdata(mainboardcontent,j);break;[br] case "3": showdata(ramcontent,j);break;[/br] case "4": showdata(harddcontent,j);break;[br] default: document.write("<option value=\""+j+"\">"+j+"</option>");break;[/br] }[br] document.write("</select>");[/br] }[br] else if(selectdata[i*4+3]=="1")[/br] {[br] document.write("<br><input name=\"which"+j+"\"></input>");[/br] }[br] }[/br] document.write("<br><br><input type=submit></input>");[br]}[/br]function show(i)[br]{[/br] document.write("<html><head><script language=javascript src=form.js></script></head><body>");[br] document.write("<form name=\"form\" method=\"post\" action=\"\"><select name=\"which\" onchange='draw(this.options[this.selectedIndex].value);'>");[br][/br] for(var x=0;x<19;x+=4)[br] {[/br] if(selectdata[x]==i)[/br] document.write("<option selected value=\""+selectdata[x]+"\">"+selectdata[x+1]+"</option>");[br] else[/br] document.write("<option value=\""+selectdata[x]+"\">"+selectdata[x+1]+"</option>");[br] }[/br] document.write("</select><br>");[br] if(i!=0)[br] {[/br] add(i);[br] }[/br] document.write("</form></body></html>");[br]}[/br]function init()[br]{[/br] document.close();[br]}[/br]function draw(i)[br]{[/br] init();[/br] show(i);[br]}[/br]
, i discovered another script about customizable forms. You can find all what you know about it at this url 
