javascript弹出DIV 并返回值

#massage_box{ position:absolute; left:e-xpression((body.clientWidth-300)/2); top:e- xpression((body.clientHeight-200)/2); width:170px; height:50px;filter:dropshadow (color=#666666,offx=3,offy=3,positive=2); z-index:2; visibility:hidden} #mask{ position:absolute; top:0; left:0; width:e-xpression(body.scrollWidth); height:e- xpression(body.scrollHeight); background:#666; filter:ALPHA(opacity=60); z-index:1; visibility:hidden} #massage_box_1{ position:absolute; left:350px; top:e- xpression((body.clientHeight-200)/2); width:290px; height:180px;filter:dropshadow (color=#666666,offx=3,offy=3,positive=2); z-index:2; visibility:hidden} #massage_box1{ position:absolute; left:350px; top:e- xpression((body.clientHeight-200)/2); width:290px; height:180px;filter:dropshadow (color=#666666,offx=3,offy=3,positive=2); z-index:2; visibility:hidden} #mask1{ position:absolute; top:0; left:0; width:e-xpression(body.scrollWidth); height:e- xpression(body.scrollHeight); background:#666; filter:ALPHA(opacity=60); z-index:1; visibility:hidden} #mask_1{ position:absolute; top:0; left:0; width:e-xpression(body.scrollWidth); height:e- xpression(body.scrollHeight); background:#666; filter:ALPHA(opacity=60); z-index:1; visibility:hidden} #mask_2{ position:absolute; top:0; left:0; width:e-xpression(body.scrollWidth); height:e- xpression(body.scrollHeight); background:#666; filter:ALPHA(opacity=60); z-index:1; visibility:hidden} #massage_box2{ position:absolute; left:240px; top:300px; width:290px; height:180px;filter:dropshadow (color=#666666,offx=3,offy=3,positive=2); z-index:2; visibility:hidden} #massage_box_2{ position:absolute; left:240px; top:300px; width:290px; height:180px;filter:dropshadow (color=#666666,offx=3,offy=3,positive=2); z-index:2; visibility:hidden} #mask2{ position:absolute; top:0; left:0; width:e-xpression(body.scrollWidth); height:e- xpression(body.scrollHeight); background:#666; filter:ALPHA(opacity=60); z-index:1; visibility:hidden} .massage{border:#036 solid; border-width:1 1 3 1; width:95%; height:95%; background:#fff; color:#036; font-size:12px; line-height:150%} .header{background:#036; height:20px; font-family:Verdana, Arial, Helvetica, sans-serif; font-size:12px; padding:3 5 0 5; color:#fff}