function checksdzt(){
sdzt = $("#viewObj_zt_text").val();
//Call the loop, and exit the loop if the result has been obtained
loopgetinfo = setInterval("checksdztsub()",50); //Here the calls are looped, 50 milliseconds apart
}
function checksdztsub(){

if ($("#viewObj_zt_text").val() !="" && $("#viewObj_zt_text").val() != sdzt)
{
if($("#viewObj_zt_text").val() == " lock ")
{
$("#sdyydes").html("<font color='red'>*</font>  Lock reason ");
$("#viewObj_sdyy_text").attr("validate","{required:true}");
}
else if($("#viewObj_zt_text").val() == " normal ")
{
$("#sdyydes").html("  Lock reason ");
$("#viewObj_sdyy_text").attr("validate","");
}
else

sdzt = $("#viewObj_zt_text").val();
// clearInterval(loopgetinfo); // Terminate the loop
}
}