function valid_search_data()
{
	if(document.frm_search.search_text.value == "")
	{
		alert("Please Enter ISBN Number");
		document.frm_search.search_text.value = "";
		document.frm_search.search_text.focus();
		return false;
	}
	if(document.frm_search.search_text.value.length > 13)
	{
		alert("Search Value can't More Than 13 Characters");
		document.frm_search.search_text.focus();
		return false;
	}
	if(document.frm_search.search_text.value != "")
	{
	    chk1="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01293456789";
		for(j=0;j!=document.frm_search.search_text.value.length;j++)
		{
		 ch1=document.frm_search.search_text.value.charAt(j);
		 rtn1=chk1.indexOf(ch1);
		 if(rtn1==-1)
		 {
			alert("Only Alphabets and Numbers Values Are Allowed As ISBN Search");
			document.frm_search.search_text.focus();
			return false;
			break;	
		 }
		}	
	}
	
return true;
}
function valid_search_data_1()
{
	if(document.frm_search_1.search_text.value == "")
	{
		alert("Please Enter ISBN Number");
		document.frm_search_1.search_text.value = "";
		document.frm_search_1.search_text.focus();
		return false;
	}
	if(document.frm_search_1.search_text.value.length > 13)
	{
		alert("Search Value can't More Than 13 Characters");
		document.frm_search_1.search_text.focus();
		return false;
	}
	if(document.frm_search_1.search_text.value != "")
	{
	    chk1="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01293456789";
		for(j=0;j!=document.frm_search_1.search_text.value.length;j++)
		{
		 ch1=document.frm_search_1.search_text.value.charAt(j);
		 rtn1=chk1.indexOf(ch1);
		 if(rtn1==-1)
		 {
			alert("Only Numeric Values Are Allowed As ISBN Search");
			document.frm_search_1.search_text.focus();
			return false;
			break;	
		 }
		}	
	}
	return true;
}