这句语句有什么语法异常吗？如何改

这句语句有什么语法错误吗？怎么改？
RegisterStartupScript("PassWord", "<script language='javascript'>TxtPassword.value='" && Txt_Hid_Pass.Text && "';form1.TxtPassword.value='" && Txt_Hid_Pass.Text && "'</script>");


[解决办法]
RegisterStartupScript("PassWord", "<script language='javascript'>TxtPassword.value='" + Txt_Hid_Pass.Text + "';form1.TxtPassword.value='" + Txt_Hid_Pass.Text + "'</script>");