Parent Form Contents are disappearing and showing just the text "object"

Hi expertise,

I have a hyper link in the crystal report and in the formula section ,I am using the following formula as I needed to send some parameters  to the modal pop up window to display some details based on the parameters in .NET web form

"javascript:window.open('http://localhost/test/reports/PlanLevelDetailReport.aspx?Market=" + {IRPT_MKT_SEG.IRPT MKT SEG, level 1 (long)}

+ "&ESL=" + {EDU_SERVICE_LEVEL.EDU SERVICE LEVEL, level 1 (long)}

+ "&DEDRC=" + {DED_RC_NAME.DED RC NAME, level 1 (long)}

+ "&RCMGR=" + {DED_RC_MGR.DED RC MGR, level 1 (long)}

+ "','','toolbar=no,menubar=no,scrollbars=no,resizable=yes','');"

If you see attached the screenshot , the first screenshot(Capture1) shows the  report where I have put the hyper link for all the columns(Measures).

If I click the link, it is properly opening the modal pop up as per my requirement.But the parent web form Contents are disappearing and showing just  the text "object"as in the second screenshot(Capture2) of the attached document.

I dont know why,

Please need help on this.

Thanks,

Usha