function trimAll(sString){    while (sString.substring(0,1) == ' '){        sString = sString.substring(1, sString.length);    }    while (sString.substring(sString.length-1, sString.length) == ' '){        sString = sString.substring(0,sString.length-1);    }    return sString;}/* Function for email check. */function echeck(str) {	var at="@";	var dot=".";	var lat=str.indexOf(at);	var lstr=str.length;	var ldot=str.indexOf(dot);	var lastdot=str.lastIndexOf(dot);		    temp = (str.substring(lastdot+1,lstr));	if (str.indexOf(at)==-1){	  return false;	}	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){	  return false;	}	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){	  return false;	}	if (str.indexOf(at,(lat+1))!=-1){	  return false;	}	if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){	  return false;	}	if (str.indexOf(dot,(lat+2))==-1){	  return false;	}	if (str.indexOf(" ")!=-1){	  return false;	}	if(isNaN(temp))	{    return true;  }  else  {    return false;  } 	return true	;				}function contact_us_form_validation() {	var fname = document.getElementById('fname').value;	var lname = document.getElementById('lname').value;	var email = document.getElementById('email').value;	var phone_number = document.getElementById('phone_number').value;	var phn_type1 = document.getElementById('phn_type1').value;	var phn_type2 = document.getElementById('phn_type2').value;	var phn_type3 = document.getElementById('phn_type3').value;	var error_msg='';		  	/* check First name is blank or not */	if(trimAll(fname) == ''){	  error_msg += "Please enter your First Name.\n";	}				/* check Last name is blank or not */	if(trimAll(lname) == ''){	  error_msg += "Please enter your Last Name.\n";	}		/* check Email is blank or not */	if(trimAll(email) == ''){	  error_msg += "Please enter your Email.\n";	}	/* check Email format */	if(trimAll(email) != "") {	  if(echeck(email) != true)	  {		  error_msg += "Please enter valid Email.\n";	  }	}		if(trimAll(phone_number) != '') {	  if((document.contact_us_frm.phn_type[0].checked == false) && ( document.contact_us_frm.phn_type[1].checked == false) && ( document.contact_us_frm.phn_type[2].checked == false)) {	  /* if((phn_type1 == '') && (phn_type2 == '') && (phn_type3 == '')) { */		error_msg += "Please select the type of phone number.\n";	  }	}				if(error_msg != "") {		alert (error_msg);		return false;	}	else {		return true;	}}