A.html
<html> <head> <title>メインページ</title> <スクリプト言語= "javascript" type = "text/javascript"> function opennew（）{var im = new idandmethod（）; im.id = document.getElementById（ "txtid"）。value; window.showmodaldialog（ "ddd.html"、im、 ""）; }関数idandmethod（）{this.id = "ddd"; this.method = settxt; } function settxt（str）{document.getElementById（ "txtid"）。value = str; } </script> </head> <body> <form action = "＃"> <input id = "txtid" type = "text" value = "xxx！idを入力してください！" /> <br/> <input type = "button" value = "open new window" onclick = "opennew（）"/> </form> </body> </html>b.html
<html> <head> <title>メインページ</title> <スクリプト言語= "javascript" type = "text/javascript"> var im; function load（）{im = window.dialogarguments; if（im.id == "xxx！enter id here"）document.getElementbyId（ "txtid1"）。value = "何らかの方法で入力しますか！"; else document.getElementById（ "txtid1"）。value = im.id; } function set（）{im.method（document.getElementById（ "txtid1"）。value）; } </script> </head> <body onload = "load（）"> <form action = "＃"> <input id = "txtid1" typent = "text" value = "ddd"/> <br/> <input type = "button" pass "onclick =" set（） "/> </form> </body