$(document).ready(function() {
	  $('#by_keywords').click(function() {					   
						   var var_name = $('#by_keywords').attr('checked')?1:0;
						   $('#by_date').removeAttr('checked'); 
						   $('#search_box').attr('readonly', false); 
						   $('#cal_icon').addClass("hide");
						   //this.checked = true;
												   //alert(var_name);
		});	
	  	  $('#by_date').click(function() {					   
						   var var_name = $('#by_date').attr('checked')?1:0;
						   //alert(var_name);
						$('#by_keywords').removeAttr('checked');
						 $('#search_box').attr('readonly', true); 
						
	                          $('#cal_icon').removeClass("hide");
		});	
		  

 });


function noSpecialchars(e)
{
var keynum;
var keychar;
var numcheck;

if(window.event) // IE
	{
	keynum = e.keyCode;
	}
else if(e.which) // Netscape/Firefox/Opera
	{
	keynum = e.which;
	}
	//keychar = String.fromCharCode(keynum);
keychar = String.fromCharCode(keynum);
//numcheck = /\d/; //restrict only numbers
numcheck =/\#|\@|\!|\~|\%|\^|\&|\*|\(|\)|\+|\=|\[|\]|\{|\}|\|\<|\>|\"/
return !numcheck.test(keychar);
}