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<html><head><title>date diff </title><script type="text/javascript">function calc(){ d1=document.form1.date1.value d2=document.form1.date2.value a1=document.form1.day1.value a2=document.form1.day2.value y1= document.form1.year1.value y2= document.form1.year2.valuevar myDate1=new Date()var myDate2=new Date()myDate1.setFullYear(y1,a1,d1)myDate2.setFullYear(y2,a2,d2)alert(myDate1-myDate2)}}</script></head><body ><center><form name="form1" >Date 1<select size="1" name="date1"><script language="javascript">var ifor(i=1;i<=31;i++)document.writeln("<option>" + i )</script></select><select size="1" name="month1"><script language="javascript">var ifor(i=1;i<=12;i++)document.writeln("<option>" + i )</script></select><select size="1" name="year1"><script language="javascript">var ifor(i=2003;i<=2006;i++)document.writeln("<option>" + i )</script></select><br/><br/>Date2<select size="1" name="date2"><script language="javascript">var ifor(i=1;i<=31;i++)document.writeln("<option>" + i )</script></select><select size="1" name="month2"><script language="javascript">var ifor(i=1;i<=12;i++)document.writeln("<option>" + i )</script></select><select size="1" name="year2"><script language="javascript">var ifor(i=2003;i<=2006;i++)document.writeln("<option>" + i )</script></select><br/><br/><input type=submit onClick=calc()></center></body></html>