Introduction to javascript loop call examples_javascript skills

function checksdzt(){
sdzt = $("#viewObj_zt_text ").val();
//Loop call, if the result has been obtained, exit the loop
loopgetinfo = setInterval("checksdztsub()",50); //Loop call here, with an interval of 50 milliseconds
}
function checksdztsub(){

if ($("#viewObj_zt_text").val() !="" && $("#viewObj_zt_text").val() != sdzt)
{
if($("#viewObj_zt_text").val() == "Lock")
{
$("#sdyydes").html("* 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 loop
}
}