function check() {
if(document.getElementById("name").value=="") {
alert("Please Enter Your Name");
document.getElementById("name").focus();
return false;
}
if(document.getElementById("phone").value=="") {
alert("Please Enter Your Phone");
document.getElementById("phone").focus();
return false;
}
if(document.getElementById("email").value=="") {
alert("Please Enter Your Email");
document.getElementById("email").focus();
return false;
}
if(!echeck(document.getElementById("email").value)) {
return false;
}
if(document.getElementById("case_details").value=="") {
alert("Please Enter Your Case Details");
document.getElementById("case_details").focus();
return false;
}
}


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("Please Enter Valid E-mail ID");
		   return false;
		}

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

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

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

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

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Please Enter Valid E-mail ID");
		    return false;
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Please Enter Valid E-mail ID");
		    return false;
		 }

 		 return true					
	}