function check()
{
     var a=document.fem;
	
	 if(a.txtName.value=="")
	 {
	   alert("Please enter Name");
       a.txtName.focus();
	   return false;
     }
	 if(a.txtPhone.value=="")
	 {
	   alert("Please enter Phone Number");
       a.txtPhone.focus();
	   return false;
     }
	 if(a.txtEmail.value=="")
	 {
	   alert("Please enter Email Address");
       a.txtEmail.focus();
	   return false;
     }  
	 if(a.txtComments.value=="")
	 {
	   alert("Please enter Project details");
       a.txtComments.focus();
	   return false;
     }
		var at="@"
		var dot="."
		var lat=a.txtEmail.value.indexOf(at)
		var lstr=a.txtEmail.value.length
		var ldot=a.txtEmail.value.indexOf(dot)
		if (a.txtEmail.value.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false;
		}

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

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

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

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

		 if (a.txtEmail.value.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false;
		 }
		
		 if (a.txtEmail.value.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false;
		 }
	  
 }