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var myParamElement1 = document.createElement('<PARAM NAME=movie VALUE="/japan/images/flash/mainflash_home.swf">');
var myParamElement2 = document.createElement('<PARAM NAME=menu VALUE=false>');
var myParamElement3 = document.createElement('<PARAM NAME=quality VALUE=high>');
var myParamElement4 = document.createElement('<PARAM NAME=bgcolor VALUE=#FFFFFF>');
var myParamElement5 = document.createElement('<PARAM NAME=wmode VALUE=transparent>');

myObjectElement.appendChild(myParamElement1);
myObjectElement.appendChild(myParamElement2);
myObjectElement.appendChild(myParamElement3);
myObjectElement.appendChild(myParamElement4);
myObjectElement.appendChild(myParamElement5);

main_flash.appendChild(myObjectElement);