Hi,<BR>I am using advise method of INPUT text field for onchange event for my textfield<BR>it is working fine for IE5.0 browser but giving runtime error for IE4 and IE3.0<BR>any one can give me a solution <BR>i am using like this in my asp<BR><BR>&#060;SCRIPT FOR="txtField" EVENT="onchange" LANGUAGE="javascript"&#062;<BR>txtField.advise("on change", "IsValidNumber(txtField.value)" )<BR>&#060;/SCRIPT&#062;<BR><BR>IsValidNumber(string)<BR>{<BR> if(isNaN(string))<BR>{<BR>alert(It is not a number);<BR>}<BR>return true;<BR>}<BR><BR>Thanks in Advance.<BR>Sanjay