<input type=“Text” size=“8” readonly=“readonly” name=“JobPostDateFrom” style=“width:90px; font-size:12px;” />
<img style=“cursor:pointer;border-width:0px;” src="…/…/javascripts/dhtmlxCalendar/imgs/icon_minicalendar.gif" onclick=“rb(1,‘JobPostDateFrom’)”/>
<input type=“Text” size=“8” readonly=“readonly” name=“JobPostDateTill” style=“0px;width:90px;font-size:12px;” /> <img style=“cursor:pointer;border-width:0px;”
src="…/…/javascripts/dhtmlxCalendar/imgs/icon_minicalendar.gif" onclick=“rb(2,‘JobPostDateTill’)”/>
<input type=“Text” size=“8” readonly=“readonly” name="JobPostDateFrom"
must be
<input type=“Text” size=“8” readonly=“readonly” id="JobPostDateFrom"
same for other input ( the constructor of calendar requires ID of HTML element )