function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true
	}

function IsNumeric(sText)
{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;


   for (i = 0; i < sText.length && IsNumber == true; i++)
      {
      Char = sText.charAt(i);
      if (ValidChars.indexOf(Char) == -1)
         {
         IsNumber = false;
         }
      }
   return IsNumber;

   }


function ValidateForm(){
  if(document.myform.fname.value.length<=0 )
    {
	    alert("Please fill in all mandatory fields.");
	    document.myform.fname.focus();
	    document.myform.fname.select();
	    return false;
    }

    if(document.myform.companyname.value.length<=0 )
    {
	    alert("Please fill in all mandatory fields.");
	    document.myform.companyname.focus();
	    document.myform.companyname.select();
	    return false;
    }

    var phoneID=document.myform.telephone

    if(!IsNumeric(phoneID.value))
    {
		    alert("Please fill in all mandatory fields.");
		    phoneID.focus();
		    phoneID.select();
		    return false;
    }

   /* if(document.myform.phone.value.length<=0 )
    {
		    alert("Please enter phone number");
		    document.myform.phone.focus();
		    document.myform.phone.select();
		    return false;
    }*/
	var emailID=document.myform.email

	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please fill in all mandatory fields.")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	return true
 }