// JavaScript Document
var selectRowIndex = Array();
function getSelectCheckboxValues(name){
	var obj = document.getElementsByName(name);
	var result ='';
	var j= 0;
	for (var i=0;i<obj.length;i++)
	{
		if (obj[i].checked==true){
				selectRowIndex[j] = i+1;
				result += obj[i].value+",";
				j++;
		}
	}
	return result.substring(0, result.length-1);
}

function check(){

		var cmpname=document.form.cmpname.value;

		if(cmpname.length<1){

				alert('请输入贵公司名称。');

				document.form.cmpname.focus();

				return false;

			}

			

		var username=document.form.username.value;

		if(username.length<1){

				alert('请输入联系人姓名。');

				document.form.username.focus();

				return false;

			}



		var tel_chars = "-1234567890";

		var i;

		var tel=document.form.tel.value;

		if(tel.length>1){

			for (i=0;i<tel.length;i++){

				if (tel_chars.indexOf(tel.charAt(i))==-1){

					alert("请以数字输入电话号码。");

					document.form.tel.focus();

					return false;

				}

			}

		}

		var fax=document.form.fax.value;

		if(fax.length>1){

			for (i=0;i<fax.length;i++){

				if (tel_chars.indexOf(fax.charAt(i))==-1){

					alert("请以数字输入传真号码。");

					document.form.fax.focus();

					return false;

				}

			}

		}











	var email=document.form.email.value;

	if(email.length<1)

	{

		alert("请输入E-mail地址。");

		document.form.email.focus();

		return false;

	}

	else

		{ 

		 invalidChars = " /;,:{}[]|*%$#!()`<>?"; 

		if (email == "") 

			{ 

			alert("E-mail地址不正确。");

			document.form.email.focus();

		    return false; 

			} 

		for (i=0; i< invalidChars.length; i++) 

			{ 

		  badChar = invalidChars.charAt(i) 

		  if (email.indexOf(badChar,0) > -1) 

				 {

			  alert("E-mail地址不正确。");

			  document.form.email.focus();

		      return false; 

				 } 

			} 

		atPos = email.indexOf("@",1) 

		if (atPos == -1) 

			{ 

			alert("E-mail地址不正确。");

			document.form.email.focus();

			return false; 

			} 

		if (email.indexOf("@", atPos+1) != -1) 

		 { 

			alert("E-mail地址不正确。");

		    document.form.email.focus();

		    return false; 

		 } 

		 periodPos = email.indexOf(".",atPos) 

		if(periodPos == -1) 

			 { 

			 alert("E-mail地址不正确。");

			 document.form.email.focus();

			 return false; 

			 } 

		if ( atPos +2 > periodPos) 

		 { 

			alert("E-mail地址不正确。");

			document.form.email.focus();

		    return false; 

		 } 

		 if ( periodPos +3 > email.length) 

		 { 

			 alert("E-mail地址不正确。");

			 document.form.email.focus();

			 return false; 

		 }

		 

		}

	

	var email2=document.form.email2.value;

	if(email2!=email){

			alert('请重新输入E-mail地址。');

			document.form.email2.focus();

			return false;

		}

	var content=document.form.content.value;

	if(content.length<1){

			alert('请输入您要咨询的内容。');

			document.form.content.focus();

			return false;

		}
	var knowus = getSelectCheckboxValues('knowus');
	if (!knowus)
	{
		alert('请选择您是通过何种途径知晓本公司的。');
		return false;
	}
}