function chk_nav(page_No,tatal_rec,rec_page,nav)
{

	var disArray =new  Array('images/first-disabled.gif','images/prev-disabled.gif','images/next-disabled.gif','images/last-disabled.gif','images/add-disabled.gif','images/delete-disabled.gif','images/edit_disabled.gif','images/save-disabled.gif','images/cancel-disabled.gif','images/back-disabled.gif','images/search-disabled.gif','images/print-disabled.gif');
	var enaArray =new 	Array('images/first.gif','images/prev.gif','images/next.gif','images/last.gif','images/add.gif','images/delete.gif','images/edit.gif','images/save.gif','images/cancel.gif','images/back.gif','images/search.gif','images/print.gif');
	var condition =new Array(1,1,1,1,0,0,0,0,0,0,0,0);
	if (tatal_rec % rec_page>0) {
		pages =Math.floor(tatal_rec / rec_page) +1;
	}
	else {
		pages =Math.round(tatal_rec / rec_page);
	}
	//alert(pages)
	if(pages=="1" || page_No=="0" || tatal_rec=="0" || rec_page=="0"){
		condition[0]=0;
		condition[1]=0;
		condition[2]=0;
		condition[3]=0;
	}
	else if(page_No=="1"){
		condition[0]=0;
		condition[1]=0;
	}
	else if(page_No==pages){
		condition[2]=0;
		condition[3]=0;
	}
	var temp;
	for(i=0;i<12;i++) {
		temp=nav.charAt(i) | condition[i];
		if (temp==0){
			document.all("img"+ (i+1)).style.cursor='default';
			document.all("img"+ (i+1)).src=disArray[i];
			document.all("b"+ (i+1)).disabled=true;
		}else{
			document.all("img"+ (i+1)).style.cursor='hand';
			document.all("img"+ (i+1)).src=enaArray[i];
		}
		//document.write(temp)
	}

}

document.write("<table width=\"220\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\"><tr>");
document.write("<td width=\"20\"><button  id=\"b1\" onclick=\"javascript:f_submit('first')\"><img id=\"img1\" src=\"images/first.gif\" style=\"cursor:hand\"  alt=\"First\"/></button></td>");
document.write("<td width=\"20\"><button id=\"b2\" onclick=\"javascript:f_submit('prev')\"><img id=\"img2\" src=\"images/prev.gif\" style=\"cursor:hand\" alt=\"Prev\"/></button></td>");
document.write("<td width=\"20\"><button id=\"b3\" onclick=\"javascript:f_submit('next')\"><img id=\"img3\" src=\"images/next.gif\" style=\"cursor:hand\" alt=\"Next\"/></button></td>");
document.write("<td width=\"20\"><button id=\"b4\" onclick=\"javascript:f_submit('last')\"><img id=\"img4\" src=\"images/last.gif\" style=\"cursor:hand\" alt=\"Last\"/></button></td>") ;
document.write("<td width=\"20\"><button id=\"b5\" onclick=\"javascript:f_submit('add')\"><img id=\"img5\" src=\"images/add.gif\" style=\"cursor:hand\" alt=\"Add\"/></button></td>");
document.write("<td width=\"20\"><button id=\"b6\" onclick=\"javascript:f_submit('del')\"><img id=\"img6\" src=\"images/delete.gif\" style=\"cursor:hand\" alt=\"Delete\"/></button></td>");
document.write("<td width=\"20\"><button id=\"b7\" onclick=\"javascript:f_submit('edit')\"><img id=\"img7\" src=\"images/edit.gif\" style=\"cursor:hand\" alt=\"Edit\"/></button></td>")
document.write("<td width=\"20\"><button id=\"b8\" onclick=\"javascript:f_submit('save')\"><img id=\"img8\" src=\"images/save.gif\" style=\"cursor:hand\" alt=\"Save\"/></button></td>")
document.write("<td width=\"20\"><button id=\"b9\" onclick=\"javascript:f_submit('cancel')\"><img id=\"img9\" src=\"images/cancel.gif\" style=\"cursor:hand\" alt=\"Cancel\"/></button></td>");
document.write("<td width=\"20\"><button id=\"b10\" onclick=\"javascript:f_submit('back')\"><img id=\"img10\" src=\"images/back.gif\" style=\"cursor:hand\" alt=\"Back\"/></button></td>");
document.write("<td width=\"20\"><button id=\"b11\" onclick=\"javascript:f_submit('search')\"><img id=\"img11\" src=\"images/search.gif\" style=\"cursor:hand\" alt=\"Search\"/></button></td>");
document.write("<td width=\"20\"><button id=\"b12\" onclick=\"javascript:f_submit('print')\"><img id=\"img12\" src=\"images/print.gif\" style=\"cursor:hand\" alt=\"Print\"/></button></td></tr></table>");