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<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <htmlxmlns="http://www.w3.org/1999/xhtml"> <head> <metahttp-equiv="Content-Type"content="text/html;charset=gb2312"/> <title>表单填写与验证</title> <linkhref="css/fullform.css"rel="stylesheet"type="text/css"/> <styletype="text/css"> <!-- #Layer1{ display:none; position:absolute; left:409px; top:63px; width:191px; height:34px; z-index:1; } #Layer2{ display:none; position:absolute; left:409px; top:106px; width:191px; height:34px; z-index:2; } #Layer3{ display:none; position:absolute; left:410px; top:146px; width:190px; height:35px; z-index:3; } #Layer4{ display:none; position:absolute; left:414px; top:289px; width:175px; height:27px; z-index:4; } --> </style> <scripttype="text/javascript"> functionchange() { if(document.form1.checkbox3.checked==true) document.form1.Submit2.disabled=false; else document.form1.Submit2.disabled=true; } functioncheckAll() { if(checkuser()&&checkpwd()&&checkrepwd()&&checkemail()) returntrue; else returnfalse; } functioncheckuser(){ vartxtu=document.form1.user.value; for(vari=0;i<txtu.length;i++){ if(txtu[i]=="_"){ document.getElementById("Layer1").style.display="block"; returnfalse; } else { document.getElementById("Layer1").style.display="none"; } } returntrue; } vartxtp functioncheckpwd() { txtp=document.form1.pwd.value; if(txtp.length<6) {document.getElementById("Layer2").style.display="block";returnfalse;} else{document.getElementById("Layer2").style.display="none";} returntrue; } functioncheckrepwd() { vartxtre=document.form1.repwd.value; if(txtre!=txtp) {document.getElementById("Layer3").style.display="block";returnfalse;} else{document.getElementById("Layer3").style.display="none";} returntrue; } functioncheckemail() { vartxte=document.form1.email.value; if(txte.indexOf("@",0)==-1) {document.getElementById("Layer4").style.display="block";returnfalse;} returntrue; }